I was in a similar position a few months ago, currently I use a DS Logic USB logic analyzer (16 channel 100Mhz) with 16M sample buffer for serial decoding and digital work.
As a hobby user I've found the Micsig easy to use and intuitive to use, and has all the features I need, the battery power and small desk footprint I find useful. Given the limited desk space at work it's also a handy desk scope, especially since you don't need to hunt around for a power socket each time you use it.
You can see the review I wrote on the forums.
Everyone that owns one has been been positive, I prefer it over the Rigol, but I'm keen to what other people's views are.