Rand McNally tablet with Sirius XM.... To buy or not to buy

We currently have a TND 730 and are getting by just fine. The new tablet looks really cool and there is a Pro version that can even run Sirius XM radio. We also have SiriusXM with a standard unit to control it which drives me nuts because I like to rewind every preset channel and have to press the rewind button 30 times to go back through all the ads. If the new tablet-based SiriusXM could rewind it with one press that alone would be worth the purchase price. Does anybody know if the new tablet can do this. My wife wants to know if the software powering the new tablets is better than the software used by the 730. We have docked this countless times and it still has errors. In short is there any reason to buy this tablet?

 

We have Sirius already and a TND 730. I just want to rewind a preset with ease. The dash cam is a plus too.