Chaser is my main, Rumor 2 as my backup...Samsung M535, the Arc, the Snapper, The Vox 8610
Motorola v60i, Nokia 5180i (both retired after 2 years)
Nokia 1221, Motorola v170
Virgin Mobile USA
I would imagine alot depends on your location, and how strong a signal you can get from the nearest tower...that aside, I've found the ARC has full strength all the time for me...tho' I am in NY and we have coverage pretty much everywhere...(I also never had a signal problem with the Snapper, either...)
I've found that my Shuttle tends to get about 1-2 bars (closer to 1 bar) better reception than my X-tc. This shows beyond the difference in bars; there is much less distortion in the voice I hear on my Shuttle when I am in (relatively) weak signal areas. (Those are the only 2 VM phones I've tried yet.)
Rumor 2 is best. My new Arc seems to be great too. The slash I bought last week though stinks. My TNT holds a better signal. I'm interested in the Mantra. I was considering buying one until I aw the Arc so cheap.