I am not sure of your requirements so I would check the dedicated hosting offers section for deals. I know Burst has a Quad with 8GB for $99.95 now. Webhost-Warehouse (Burst Reseller) has a similar machine but for $90.
You can check out different companies like Ubiquity, Wholesale Internet, Carat Networks, etc.... a bunch of good companies post here.
I don't have any boxes in Dallas myself as I prefer the east coast (specifically NYC). I would check out Softlayer as many have great things to say about them. Do check the forum I mentioned as plenty of choices for you in that area.