To relaod vista, or wait to win 7 or have both? help :)

I know this isnt really for this section though didnt know where else to put it. i just want some opinions on best ideas.

ok im a student and i will be finishing my exams in 3 weeks, and will have a week off. all the work on my pc will no longer be important as i will be going into the next year so its a perfect time for a sping clean of the pc.

also my PC is getting really messy. i have 2x500GB hard drives in RAID 0, which have vista 32,64,linux and xp on them. but i really only use vista 64 now. i have a 500GB hard drive for data though its been causing the PC to crash now and then. and a 250GB hard drive which works but the sata connection is physically broke and now only works with one cable as the broke bit is in the cable lol.

iv just bought a new WD 1TB drive to replace the 2 dodgy ones. and i will kep my movies, music and games on the 1tb drive, although my fav games will go on the RAID

im wondering if i should

1. back up my data, format the entire drive and relaod windows vista. and just keep that for a long time

or

2. do same as above and then when win 7 is out format vista and load win 7 in its place meaning vista will only be on there for a few months

or

3. partition the drive, so i can put vista on now, then load win 7 later and have dual boot and maybe delete vista after a bit. but left with a random sized data partition

4. or wait for win 7

basically i will have 2 1TB drives as (2 x 500GB) are in RAID 0 and i really only need 1 OS as i never used the otheres

suggestions...

After running Windows 7 you will probably have no desire to go back to Vista.