I would buy the kit along with a Lyman manual.
The Lee stuff is good enough to start reloading with, you can always upgrade to a beter RCBS press later. I prefer the simple Lee case trimmers over the pos RCBS trimmer I have, I think Lee had the right Idea with these. I've never used the Lee powder thrower or scale, but its pretty tough to screw up a beam balance- just make sure to calibrate it every time you move it, and if the powder thrower throws within +-.5 gr. you'll do just fine with it- I would get a baffle for it if it doesn't have one already.
Lee dies- never had a problem with them.
Lee reloading manual- might contain good procedural information, but I would immediately upgrade to a Hornady, speer, or especially Lyman manual before working up loads- Lee's load information is generally very conservative and anemic.
If you ever decide to upgrade to a better press- no harm done- having a 2nd or even 3rd press set up for different calibers or for resizing and seating makes life alot easier for lazy people like me.