if you want to wait for "The First Decade" its actually a good idea, it contains:
XP conversions of:
CnC Tiberium Dawn
TD:Special Ops
Red Alert
RA:Counterstrike
RA:Aftermath
It also contains re-packed versions of:
CnC Tiberium Sun
TS:Firestorm
Red Alert 2
RA2:Yuri's Revenge
and it also contains:
CnC Renegade
CnC Generals
G:Zero Hour
10 games, assuming you count expansion packs as games, if you don't, its still 5 games + 5 expansion packs.
i mean, I'm probably going to buy it, and i've already got:
a copy of CnC DOS
CnC Win95
CnC Playstation
CnC Special Ops Win95+DOS
RA1 Win95+DOS
RA1 Playstation
an American copy of RA1 playstation
RA1 Counterstrike Win95+DOS
RA1 Aftermath Win95+DOS
a copy of RA Retaliation on playstation (i can't even play PS copies)
Tiberium Sun
a copy of TS:Firestorm (At the time, i couldn't find it to buy)
2x RA2 (I bought a second copy for LAN games)
YR
apart from the copy of CnC DOS(if you care about DOS) The First Decade will pretty much complete my collection
(DOS, Win95 and WinXP versions of CnC and RA1

)
shame about RA:Retaliation for playstation though...