yes, they are very, very good, and remain competitive amongst speakers of similar cost.
they are not perfect; their weakness is the tweeters. but you'd have to spend another $500 to improve upon them i'd say.
whilst they can handle heaps of power, and require heaps to go as loud as possible, they are also fine of moderate amounts. i've run them from around 100WRMS per channel, and that was perfectly adequate for my needs.
your alpine MRV-T420 would be fine to start with. upgrade if/when you can.