The new Marantz AV8003 Pre is excellent
You didn't say what you budget was, but usually when you are getting up to separate "Pres" you are talking high-end AVR.
I really like Marantz and the new preamp/processor is outstanding
http://us.marantz.com/Products/2317.asp
** NEW ** AV8003 Networking AV Preamp/Processor
$2599.99
Digital Media Player for Ethernet
- Audio, Video and Photo (supporting DLNA)
Video scaling and processing by Anchor Bay Technology
- Precision Video ScalerTM allows up to 1080p scaling
- Full 10bit Video Processing
HDMI V1.3a: 4-in/2-out
Dolby TrueHD, dts HD, Deep Color
DSD (SA-CD), Auto Lip Sync
XLR Pre Output Terminals for 7.1ch
XLR Audio Inputs for CD/SA-CD (Stereo)
Multi Zone Component Video Out
RC2001 Main Zone Remote(PC Programmable, Learning)
RC101 Sub Zone Remote(for Multi Zone Control, Learning)
HD Radio / XM Ready / Sirius Ready
THX ULTRA2 Certified
Copper Plated Chassis
Toroidal Power Transformer
New Clean Front Panel
Most AVR vendors have pretty high end integrated pre and amps now!