B44 Hop Ups Worth Fitting During Build?

[Scoobster]

I going to be ordering a B44 within the next couple of weeks and just wondered if there were any hop ups worth buying at the same time and fitting while building the kit? I will be getting the Lipo Trays and Straps (not sure if i should go for the brass or carbon ones yet) and some of Northy's Whities O-Rings.

Are the Factory Team Alloy Shock Tops & Tower Mounts worth having? Are the kit screws OK or worth up-grading? Anything else worth changing from the off?

Also does anyone know of any good deals on B44 Kits? Cheapest i have found is £229.99 with free P&P

Thanks in advance