Hopefully some Juniper guru's can chime in here

Our shop, and myself for that manner, haven't had any experience with Juniper in the past. We are going to be finally replacing our often failing as of lately Linksys RV series VPN routers at our remote offices. We were originally going to go the route of ASA 5505's since we have a 5510 at the main office and I've been familiar with it as well as having a 5505 at home so it's more in my comfort zone. At this point though, apparently ASA 5505's are fairly difficult to obtain - CDW was estimating 90+ days for ~40 units.
Just wondering how something like the SSG5 compares to the ASA's. Obviously both would be a significant upgrade from what we are currently running. Not looking for anything spectacular except basic firewall and l2l VPN capabilities. The UTM option on the SSG5 *might* be something we look into but probably further down the road when the budget allows if we opted to go that route. Just wondering how a Cisco guy like myself is going to pickup the SSG5 and if they will play well with an ASA at the other end. I'm not a know all expert when it comes to VPN configurations and to be quite honest - going either the Cisco or Juniper route from the path we were taking before (l2l VPN's created in the web interface of the Linksys routers to a Linksys router on our IT network strictly for remote access) is going to be a bit of a learning curve either way.
The SSG5's allure are they seem to be available now which is important, and they have a more attractive price. On paper they seem to be a bit lower end when comparing specifications to an ASA 5505 but I'm confident our load isn't going to be much of a burden on either platform. Thoughts?