If you need to use effects it just means you're playing sh*te records
LOL
There is never a "need", but a good DJ will use effects and even samples to remix on the fly quite often. The effect built into the newer top end Pioneer DJM mixers are so powerful (when used correctly) that you can really add to a mix if you know what you're doing. But if you don't know what you're doing, of course you can muck it all up! I've used the inbuilt sampler in Pioneer DJM's before to essentially loop a certain part of a record over and over again, perhaps in a part where the beat dropped, or re-loop a vocal when the vocal drops out, to good effect numerous times. The beat loop fucntions on Pioneer CDJ's is an absolute winner for creating mixable loops on the Fly, especially useful for mixing into tracks with very short intros (Deadmau5's Bye Friend being one example track).
I'd say if you're just starting though, leave effects well alone for a few years, and avoid those Behringer mixers like the plague!
I have a Vestax PCV-275 and it's good!
this is a pile of toss. vestax mixers are great, really well made & thought out (loads of space between dials & faders). probably not the greatest mixers for house & techno (Pioneer DJM 600 was when i was djing) but one of if not the best for scratching.
I've used a PCV-275 a few times, it was crap compared to cheaper competition. The Ecler Nuo3.0 for example at roughly the same price, blows it into the weeds in terms of quality and sound. Vestax mixers give the impression of being well made, but I've played on a fair few Vestax mixers in my time, none of them more than a couple of years old, all the faders leak, the EQ's are dire, all the knobs are VERY close together and small so hard to get good control of, the headphone outputs are either too quiet, or too loud (and lacking in quality)... I could go on! I don't know any DJ's that actually get paid to play (I've not been paid for a year or so, I'm no Carl Cox but I used to get a couple of hundred quid a set usually) that would use a Vestax Mixer out of choice. If it's a cheap mixer you need, ironically something like Numark will be much better. Or spend a bit more money on something like an Ecler Nuo, or even more on a Pioneer DJM...
As far as the argument for other turntables goes, well of course eventually someone was going to build a deck more capable than the Technics, but it took them more than 20 years! By this time, the 1210 was an industry standard. And like most industry standards, it's pointless learning your trade on anything else, because as soon as you come to play in a club for the first time, guess what decks will be in the DJ booth!!! A clue... They won't be Vestax, or Numark, or Citronic...
Same goes for Pioneer with CD decks, other makes often release something thats the new best thing, but Pioneer are industry standards. It's not necessarily about having the best kit, but being able to practice on the kit you're going to be playing out on in the clubs. This way you're prepared and know how to turn a good set out when you're in the club!
There is often a load of sh*te spouted by bedroom DJ's about how you should buy one thing over another. Often it's the same as in the Mountain Bike world, it's recycled marketing guff! But even more so than in the MTBing world, if you want to be good, look at what the Pro's are using...
Anyway, if you do take to DJing, you're more than likely to be doing it all off your laptop (perhaps still using the 1210s to control it) soon enough anyway...