First off, you get what you pay for. If something costs a lot less than most of the items in its category, its probably cheap. Thats not always true, 100% of the time, but its a fair general rule.
To your original question. Since you are mostly on road, OME has a very good reputation for their lift. Most folks get around 2.5" of lift with it. I can attest to the much improved ride over my old lift (procomp I think). Also I think mine is getting me closer to 3", but possible it will still settle a little. Then you can add a 1" body lift for around $100. This combo has very good road manners, and is plenty capable offroad (should the need/desire ever arise).