If you are using radar for novelty, glancing and not very into the radar images, than go with the free stuff (wunderground is prob the best amongst the free radars that I've seen). If you using radar software for more in depth use, want customizable data, and are more serious about radar imagery, its a no brainer to go with GrLevelX software. Its a one-time fee of $79 dollars and gives you a ton of info. I'm pretty sure you can put the radar imagery onto a website. The GrLevel3 is the most basic info. For real enthusiasts and people who know how to interpret the images, GrLevel2 and Analyst are pretty amazing. I have level 3 as I am still not savvy enough for the upgrade.
As with many of us I'm sure, we were all in the exact same place. Of course, it's only 1 opinion but you can't go wrong with GrLevelx products. You can also use Allison House subscriptions to include additional data. For $79 (US), its worth every penny in my book.