While it is true that the original 1200 was designed for hi-fi - because in the early 70's there was no DJ-thing going on so it couldn't be made for DJ.s.. - the 1210 was Technics answer to the needs of DJ's so the 1210 is designed for DJ's, with advanced pitch control etc that DJ's likes and needs. Technics simply adjusted their turntable to what the buying public used them for. But as I wrote, one can of course use the 1210 for hi-fi even if it is a DJ-version of what once was in it's original and first version a hi-fi turntable. It is the 1210 we discuss here...
I feel your wording here may be unintentionally confusing. It was the Mkll in 1978 that introduced changes that helped establish this originally hifi table as a firm DJ favourite with increased torque, better damping and slider pitch control. It also introduced Quartz control but all of these also served to improve its basic 1972 hifi credentials as well. The 1200 designation with the MKll simply represents 'silver' and the 1210 'black', not 'hifi' and 'DJ' respectively.
I think the key to remember with the SL1200 & 1210, is that DJ's use it for a reason. You need the record to stay bang in time in order for a mix to sound half decent, (modern DJ) you need great start up time for cueing (radio DJ) you need reliability (everyone), you need great sound quality. (everyone). the sl1200 series has all of these in spades. then if you want to improve it further you can.
This is about as good a summary as one could express about this TT.
If not sold by next week, I'll go pick up the Technics SL1210 MKII.
And after I've done that I'll save up to buy the Denon DL110 Cartridge this summer.
Wish you luck and let's know how it goes for you. As to the cartridge, the 110 will be fine but perhaps you should further review some of the forum threads here as there are other fine choices that may be better made after considering the sound you prefer and the rest of your system such as phono stage.