I second the McCormack recommendation with the following suggestions. A pair of McCormack DNA 0.5's (Deluxe if you can get them) you can start with one then add another later and vertically drive your 2Ce Sig's. Next find a TLC-1 or Micro Line Drive (MLD) both of these offer dual outputs that can be connected at the same time, the TLC-1 has a buffered and passive output while the MLD has an active and passive output. The MLD is the most versatile because the active output can be adjusted +/- 3dbs, the -3dbs point is about 1db higher than the passive output. These will offer you the opportunity to experiment with passive verses active route and discover which you prefer. Just remember with the passive route you need to pay close attention to the interconnects you use.
These are well within your price range and can be had here on Agon for half your price range as of this posting. If you like the sound of the combination you could always have them upgraded by Steve McCormack at SMc Audio. If your not sure the upgrades are worth your investment you could pick up a modified unit that comes available here on Agon every now and then.
My current set up consists of a SMc Audio TLC-1 Ultra controlling a pair of DNA 0.5's Deluxe vertically driving a pair of Vandy 3A Sig/ 2Wq combo. Have a pair of 0.5's at SMc Audio getting the Ultra Mono-block upgrade at the moment.
These recommendations will offer you a pleasing sound while you learn what you prefer in your setup.
