I sympathize with you, I am also trying to find a new phone from verizon and those were kinda my choices except that i was also looking at the HTC droid eris and HTC imagio. Anyway i know about the plans this is the deal with verizon:
Any smartphones (moto Droid and HTC pro2 ) monthly plans are as follow:
$99 per month with unlimited text and web browsing but only 450 minutes(to non verizon customers)
$119 per month with unlimited text and web browsing and 900 minutes per month (to non verizon customers) and u can add 5 favorites (so u dont have to pay for those calls)
all the plans after that are higher
I hope it helps and u find one that suits ur needs
Good luck
For samsung Rogue:
you would want to get a plan that allows you to browse online freely and if you text a lot like I do then you would want to choose the connect plan which is :
$69.99 / month unlimited texting and web browsing and 450 minutes to talk (to non verizon customers)
$89.99 / month unlimited texting and web browsing and 900 minutes to talk (to non verizon customers) and u can add 5 favorites
$109.00 / month same as above but with 1350 min
$129.99 / month unlimited