I'm a SUP instructor and have tried several ISUPs. I'm a fan of Starboard myself for their quality and variety of different shapes available. Red Paddle Co is also a nice brand. Cheaper brands tend to be "rafty" and flex a bit. I higher end board with a high PSI will be nice and stiff. If you can get an electric pump for it as well, that is ideal. Save you the trouble of manually inflating in the heat! Plus they usually are able of going in reverse for when you are done and can suck the air out of the board super quick.