Thanks Ulala, and welcome!
Aw, cheers Benny. Hucks beat me to the punch on Montell Jordan but a quick think has dredged up:
The Whitehead Brothers are the sons of the Whitehead in McFadden & Whitehead, they were on some sort of 'sensitive thug' flex. "Your Love is a 187" was the bigger hit but "Forget I Was a G" is more in keeping with the tunes posted thus far in the thread. The guitar riff in particular is ace.
I don't know much about Miss Jones (other than that her artist name makes her sound like a drama teacher, or something) but this is another cracker, big old break and wheedling high-pitched synths to the fore.
To tackle your earlier question, Benny ('New Jack Swing' (hereafter "NJS") vs 'Swingbeat'), I think NJS came first, I believe it was coined due to Teddy Riley contributing to/compiling the soundtrack of "New Jack City". "Swingbeat" followed soon after and is pretty interchangeable. I'm pretty sure the 'swing' element refers to the drums, just as we still use it in reference to garage beats - i.e. not rigid, metronomic 4/4. I don't think the 'jack' has anything to do with 'jacking' per se (cf. Steve Silk Hurley, Farley Jackmaster Funk, Reynolds Girls) - if anything, you can't jack and swing simultaneously, though I guess funky has a fairly decent stab at 4/4s crossed with 'swung' percussion.
What I find interesting is that, for many years, 'swing' was the default term for popular black music in the UK, regardless of whether it sounded akin to the tracks posted upthread or not. Compilations such as this :
"
http://www.discogs.com/Various-Sisters-Of-Swing-99/release/1425740
were still coming out in 1999, but there's very few tracks on there I'd consider to be NJS as such (Missy Elliott isn't really 'swing' in my book). Just like 'urban' is today, 'swing' became a catch-all expression and hence loads of stuff got lumped in under the term, appropriately or not. Not quite sure when the change in terminology happened, early 00's I think.
Taxonomical quibbling apart, though, it's pretty clear to me that 1990-1995 is the golden age for this sort of business. If you're looking to get hold of it, charity shops are absolutely littered with stuff of this vintage on CD, you can easily get the first Blackstreet album for a quid, plus endless compilations from which good tracks can be cherry-picked. Like this, for instance, which I got off a 2xCD compilation called 'Vybin 3':
I take great pleasure in pronouncing it in a Teutonic fashion ("Kroytz") but it is actually pronounced "Cruise". As with Boyz II Men, great matching outfits.