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
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.
There's any number of reasons why the Tannoy's can hiss that's not the speakers fault. With pro gear, sometimes people mistake signal cable with speaker cable. They look exactly the same and use the same type of connectors. I wouldn't be too concerned because Guitar Center has a good return policy.