While I can't speak to the Spitfire, I can the Bf109G-10 they released a while back, and the Fw190F-8 (although it is no built...yet.) Both are very nice and the fit is excellent.
I think these are a great way to get into LSPs without a bunch of potential cost. For some, like myself, it is easier to try out new things without fear of screwing up an expensive kit. There is one modeler that has been building the RG 1/32 new releases straight out of the box, and getting excellent results.
My plan, now that I am stoked up on the RG kits and 1/32 scale, is to build them all! Preferably in order of release.