I come from coarse fish back ground and have a beta seat box from 18 years ago, still the same as the day i bought it £15 back then

they are indestructable, totally weather proof and i am stoked i kept it as i use it on my boat trips now and it is really handy. i personally think it is plenty big enough, also i think less is better and do we really need a lot of the kit we take (own?

)
that is what i love about fly fishing the simplicity and freedom to roam

p.s. you could always get a cushion to go on top if you were planning on sitting on it, or buy one of the those foam boat seat under a £10 a fit perfectly.