My Old Box Needs Upgradation

[aku]

Well My 6 yr. old box (my 1st comp) needs upgradation.
Specification:-
1)p4 1.6 GHz
2)128+256 mb SD RAM
3)30G WD HDD
4)ECS VIAP4VMM2
6)ONBD VGA + SND
7)15" SAMSUNG CRT
8)52X CD-ROM + COMBO DRIVE

Now the q im having is (though im having a r43 ibm thinkpad) wat sud i upgrade?
1) hdd?
2) ram?
3) Dvd+-rw?

i think its gonna be all of em... machine is ageing naa...
in case of ram wat sud i do?.. move over to ddr 512 (256*2) or get a nu 512 sd (then i'll have 512 + 256 mb sd ram)..
how mch does 512 m SD / DDR costs? (in kolkata)
'' ' 256 '' '' '' ''' ? (in kolkata)

in case i have to move on to ddr.. wat am i gonna do with these present ram modules???

in case of hdd.. hw much does 80g costs? (segate . in kolkata)
and wat about dvd+-rw?... which is the best? lg/lite-on/samsung?
and how much do i have to shell for them??? (in kolkata)

pls do reply asap.. gonna make these necessary upgrades b4 weekend...

p.s. do mention the shop from whr i'll be getting those

[akshayt]

prime usage of the system