The last time we went through this here the loft sails were about 100% more expensive than the FX/Internet sails. For casual use on LIS on a hugely popular boat there is absolutely no need to incur extra expense.
My own advice would be to get a 130 genny so you can roll it up with still decent performance at 100% on those 20 knot days. The 150 would come in very handy on many summer days but you'd be better off with a light air reacher and sock as a summer winds option.
Two reef points in a loose footed main should be all that is needed.
You don't say whether you have a tall rig Cat27 so I will assume standard.
FX has the following
Mainsail...loose foot 2 reef, with insignia...$765
135% Genny $889 add $100 bucks for a 150%
Using 6.53oz Challenge Dacron Sailcloth on all.
Shop and compare! FX is here:
Catalina 27 Sails