You just need to choose your radio carefully, an Icom M505 is very shallow.
This pic shows my Assault under construction. you can just make out where the instruments are mounted on top, the 70l fuel tank mounted within the console before the hatch covering the hole was fitted, the VHF and switch panel and the rev counter.
There is an 85AH battery in the top of the console behind the VHF, a fuse box between the two inside the console and a hatch under the seat to access the area left and the rear of the tank.
It all did fit but was very tight and was the very devil to work on as there wan't an inch of extra space.
In the same circumstances I would get the bigger console if I was doing it again!
Depending on how handy/rich you are, the xtras like fuel tanks, gauges etc are a bit of a rip off. I mean how can you justify pricing a set of hydraulic steering at £600 fitted when it costs £350 to buy and you already just about paying for the time to fit it as part of the cost of the boat?
Anyway, maybe thats the T**ght Ba**d coming out in me!