from my personal experience
1. Pearl, the sound is phenomenal, wide range of tuning schemes.
the hardware is one of the most durable on the market. Plenty of options to custom your line. revamped carrier system works very well, Prices are spot on for what you get.
2. Yamaha, The hardware very durable. but with the birch shells they use for their production drums are limited in the tuning schemes. Pretty decent range of custom colors. The carrier system has some issues but for the most part works well. Price wise more expensive then Pearl. My opinion you are not getting anything more for the price. Pretty dead even. Its more a matter of what you are looking for in a drum.
Side note, What frustrates me with Yamaha, the drums the corps uses are NOT the drums available to the public. Maple are used in all top DCI Yamaha corps last summer. So what you hear on the field is not what you are going to get when you buy a Yamaha drum. I checked with Yamaha all the DCI drums are considered Prototypes and only available to be sold after the corps are done with them. Kind of like false advertising in my book.
3. Mapex, I have had limited dealings with this brand. I will say the design is a frankenstein of different brands. As far as sound the snares are a combo of birch maple. which lends the drums a sound in between Pearl and Yamaha. tenors have a inner ply of walnut which gives the drums a interesting sound. Darker then most on the market. Bass drums are all maple and have a Pearl sound to them. Hardware from what I've seen, seems durable. I have heard very little complaints about the groups I know who use them. Not a big fan of XL carrier systems. I would avoid them. Decent amount of options to custom the drums. Price point is little lower the the top two. For a start up group, I would look hard at these drums.
4. Dynasty, everything here is functional, but for me I don't see the durability. Shells are maple, but with the hardware design. it becomes a challenge to get the drums to a tuning scheme that is pleasant to my ears. Snares always have a "boxy" sound to me. with the right combo of heads and tuning they can sound decent. hardware is just not up to par with the other top brands. The tenor bar is great unfortunately its makes the drums heavier then needed. Plenty of options to customize the drums, carrier system is pretty well designed. Price point definitely makes them appealing for a group with small budget. customer service is probably the best of all the top brands.
Stay away from: Ludwig, Premier,
Ludwig, over engineered designed, poor hardware. I have to disagree with skydog on one point. I was never able to use mylar heads on the bottom with the USA snares. the stress ring on the snare side is so shallow that after a couple days the flesh hoop bottoms out on the stress ring. Forget double hooping. Fiber bottoms worked but barley. Shells on the snare were incredibly thin. which helps the drum project but durability suffered. tenors are so heavy and have no projection. just over all sub par set of drums. horrible carriers and high price point. make them a brand to avoid
Premier, I actually like the sound achieved by Premier drums,
Birch shells but they work. Its the hardware that is this brands downfall. Just always have some issue with parts either falling off or loosening up. They have to be very heavily maintained. Last time I saw the carrier system is XL, which stated before not a fan of. Plenty of options to customize.
Price point is hard to find since they only have one dealership in USA at this point. which makes support a big issue. Premier is coming back but I would still stay away at this point.
honorable mention:
Tama, I have absolutely no experience with them. From what I have seen. the hardware is top notch, the shells Maple or bubinga/birch sound amazing. Plenty of options to customize. carriers systems seem engineered the best of all brands. Only reason I don't have them in my top. is price point. Longstar percussion is the only place I saw the drums for sale and they are the most expensive on the market. You do get what you pay for. High quality. but upwards of 600 for 12x14 wrapped maple snare drum. is a little extreme. Most schools can't afford that price point.
Lonstar Percussion Snares