OK, save your dough and get the racer. The aluminum cvd bones from the team and FT cars are nice, but bend way too easily. The Ti-turnbuckles are nice, but agian I prefer Lunsford pieces.
The FT, and Team use teflon sealed bearings, and the racer uses rubber sealed, if you race on asphalt you will want to remove the inner sheild, and the rubber seals seal much better IMHO. For carpet you will most likely remove both sheilds, so the extra cash into the teflon bearings is a waste.
Get the threaded shocks, well worth the money when it comes time to tune your car (I don't own a car w/o threaded shocks)
Other optional parts you may want to pick-up (not included in any kit)
#3864 - optional suspension mounts
#3870 - 2 deg. caster blocks
#3872 - 4 deg. caster blocks
Other non-associated parts you may wanna invest in--
IRS #145 - light weight input shafts
RPM #80292 front bumper (protect like the brp piece, but looks alot better and is lighter... L@@K-- RPM bumper
The optional heatsinks serve little use, so I wouldn't worry about them. Aluminum battery straps just add weight. Amuch better way of cooling your motor is by taking a dremel w/ sanding drum and enlarging the hole below your motor...
A spool is basically a locked diff, it provides the same effects on-power as a one-way diff, however off-power you still get controlled braking action like a diff/diff set-up..... If a spool woks at your track you can just purchase a set of Losi spoolpads which allow you tolock-up your front diff.....