3 of those 5 are Cpanel based, therefore, mostly, any other Cpanel based host will have the same features.
Alentus is windows based, are you looking for something special? I mean, do you need ASP.net or MSSQL?
hostway is the biggest in that list, they offer Miva, and Miva Merchant (in case that you were interested on it).
However, without knowing your needs, is almost impossible to give you an advise
As Jedito said, please tell us what you you need (space, bandwidth, etc). Also send a few test emails. Maybe you want phone support, check which ones offer phone support.
I've noticed that the bigger a company gets, the worse the support ends up being (there are many exceptions). You can also try going with a smaller but established host here on WHT. Most importantly, search for reviews on WHT, google, and anywhere else you can find them.
I have a Web design client (fidelityrealtyllc.com) hosted with Alentus, and their service is rock-solid. I've never used any of the other hosts you mention, but based on my experience with Alentus, they would be my top pick.
Daniel B., CEO - Bezoka.com and Ungigs.com Hosting Solutions Optimized for: WordPress • Joomla • OpenCart • Moodle Data Centers in: Chicago (US), London (UK), Sydney (AU), Sofia (BG), Pori (FI) Email Daniel directly: ceo [at] bezoka.com