Canon digital XTi (10.1 MP, body $899) and kit lens EF-S 18-55 f/3.5-5.6 (with
an angle of view equivalent to a 29-88mm lens on a 35mm camera, $100). Check reviews at DPReview.
Pluses: good price, low noise, good performance, light weight.
More expensive one lens solution: EF-S 17-85 F4 IS USM (with
an angle of view equivalent to a 27-136mm lens on a 35mm camera,
with image stabilizer, $599)
One step up:
Canon EOS 30D or 40D, check 30D and 40D reviews at DPReview.
and 3 great performer and "budget" lens solution.
Canon EF 17-40mm f/4 ($ 560)
Canon EF 50mm f/1.8 ($ 70)
Canon EF 70-200mm f/4 ($ 505)
Check Supercoupon for latest discounts.
For Nikon users,
Nikon D40, D50, D80 and D70s with kit lens are good choice. D300
looks nice too.
Check reviews for the latest digital gears at DPReview.