The actual differences between Record and Chorus are usually limited to styling flourishes and a negligible amount of weight. If you crave those flourishes the way a woman wants shiny jewelry go for it (I admit to owning 10 cog Record Titanium derailleurs for that reason - the hardware does a nice job color coordinating with my titanium frame)! If you're just looking for performance differences don't bother.

Chorus Ultrashift and Record Ultrashift levers are internally identical and weigh the same 337g per pair. Record just adds two sexy cut-outs at the top of the brake blade and red "11" logo. Super Record adds a third sexy cut-out and lighter rear ratchets which save 7g per pair.

Chorus and Record cranks are both carbon sharing the same hidden fifth chain ring bolt. Record does save 40g with hollow arms; although as a 140 pound (appropriate for a 5'10" climber) atop a bike approaching the 15 pound UCI minimum that only nets a 0.05% speed increase up the steepest hills or 2 seconds on the chasing peleton for each hour you spend off the front headed to an up-hill mountain finish (the effects are proportionally less for heavier riders).

I have no clue how either would interact with a BB30 frame.

Etc.

When you're buying from an on-line UK source you're paying close to US wholesale but aren't getting a discount for buying a whole group, and will do well to make substitutions only where you want the differences.

Record dual pivot brakes come with ball thrust bearings on the pivots. I'll probably try a pair some time.

Record level hubs have grease ports which officially double (unofficially some people go decades periodically injecting fresh grease until the dirty black gunk stops coming out) the disassembly interval. Go for it - I paid extra for all my three pairs of Campagnolo hubs for that reason.