Desktop speakers for mixing AND music?


It has been a long time since I posted here, but only because I have been living in audio bliss. My two channel system is perfect (for me). Refurbished HH Scott 222 (not Mapleshade), Omega speakers and an iMac with a 2 TB 7200 rpm drive serving up about 600 lossless CDs to my Schiit Bifrost. My movie/tv set up is fine too - older B&W C series all around and an older Rotel AV receiver that (knock on wood) won't die.

However, now I have a minor problem. I have a third system that is in the works. My home office desk. Yet another two Macs are set up with a Steinberg UR22 audio/midi interface I use with Logic, Final Cut and more for recording, including music, voice, interviews and for video, though not too serious. Now, I find myself wanting to listen to music here too. So, what kind of speakers should I get? Can I get monitors that also are great for casual listening? Right now I only have the iMac built in speakers (I know...) and a pair of Audio Technica M50X headphones (in effect my Steinberg UR22 audio interface is my "headphone amp").

If I am going to use this as a true studio set up, many people are recommending monitors made for this purpose and people seem to really like JBL LSR305 5" Active Studio Monitor‎s. I can get a pair at about $300. However, it really isn't a studio as much as it is a place to work, so should I be thinking of something else? Dare I go passive and try to get some kind of little power amp? Can I do this for $400ish (and I am open to used). I do have a very old (90s era) pair of passive Tannoy monitors, but they are kind of big and I don't have a spare amp. I'd hate to go buy an amp and not be happy with the Tannoys...

However, if I go the more "audiophile" route, I might I have better sound, but not a good reference source for mixing. Right? Or am I being ridiculous? Any suggestions highly appreciated. Remember, budget of, let's say, $500.
karavite
I had 2 pairs of M Audio powered monitors for use on my and they both went bad with low hours on them. You would probably like KRK. I don't know if they are the best, but I can't see doing that much better for the same money.
See if you can find a used pair of NHT M00 powered speakers. They have TRS, XLR, and RCA input and switchable near field and mid-field equalization and they sound very good indeed.
Hi everyone, thanks for all the advice. I think active is the way to go. I was at a Guitar Center and was able to listen to quite a few of the speakers recommended here. The Adams were amazing, but way above my price... Very sad. I liked the KRK, but was a little more impressed with the JBL LR305s. However, my absolute favorite were the Tannoy 502 Reveal. They make a 4" (402 Reveal), but it is not stocked, so online is it. My only concern is there are too many online posts about the Tannoy speakers hissing. Apparently they only use a 2 prong AC cord. Sure, it could be some power/ground thing with these people and their house (and I paid a boatload to have my house rewired last year), but I just hate dealing with returns.
The Tannoys I referred to in my post above were the 502s, which I bought and returned the next day, due to "self noise". At the time I had them on my computer desk listening nearfield and found this distracting during quiet passages, in spite of them otherwise sounding excellent for their size.