If you're looking for some very high end mic preamps and are handy with a soldering iron I would recommend checking out Seventh Circle Audio. Their range of DIY mic preamp kits range from $79 up to $329. The higher end models offer circuit topology & sonic characteristics very similar to a classic Neve (shown above) or API preamp. Also available is a PSU, wiring harness and rack frame for a completed, 8 channel, professional product.
Bigger purchases get a discount, so for example, 8 Neve preamps with PSU, rack & wiring would set you back less than $3,000 or under $400 a channel. The Cheapskate studio loves that!