If I was running a tiltrotator on a 2.7t machine, I'd spec the machine from the factory with double proportional rocker auxillaries. Not expensive, and I can't see that you'd be running much else under a 2.7t that would require full setup?
Just to clarify a possible misconception.
A lot of minidiggers come with this option (Hi-spec on Kubs is an example). If you have this - and a hitch circuit - you can get away with no control system at all. There are no valves in the top of the tilty and the digger's systems control the tilt, rotate and hitch. We pioneered this approach at Plantworx 2 years ago with a Wacker Neuson. It's an inexpensive system and for many it will do most of what is needed. We've also sold this on larger 9 tonne diggers to guys who run lots of fully proportional setups. BUT it has its drawbacks: It doesn't have a swivel nor any auxiliary circuits under the tilty (so you can't run a grab) and the residuals won't be anywhere as good as a full setup.
This is where the halfway house (SS9) comes in. The digger's prop systems are still doing the legwork, but the tilt function is switchable so that you can run a grab, operate the lower hitch and so on - but not at the same time as the tilt. Eddie was an advocate of this as the starting point, as - I believe - is Ollie
@Komatsu . These days, excavator manufacturers are beginning to understand why they should offer these options, so it's becoming more affordable. FWIW, the systems are still nowhere near as good as the tilty manufacturer's proportional controls - we've been doing it a lot longer, our valve tech is better (read more expensive
@V8Druid 
) and our digital controls can vary the up and down ramp, starting and top speed and so on with more precision than a digger OEM would consider necessary. Not just Engcon, but Steelwrist and Rototilt as well. This is what you are paying for and, like anything in life, you get what you pay for.
I'll take slight issue with
@Quattromike on not sticking my head above the parapet. The original question (what is
@Dave177 view BTW

) was a very general enquiry of the sort we get regularly, but which prompts a whole host of questions from us, some of which have been aired on this thread. Some time ago on the old forum,
@V8Druid asked me directly what a basic tilty would cost and I answered him directly. Aiden
@CPS has done so here, but he and I will tell you that it seldom stops there. All responsible tilty manufacturers will dig a lot deeper and as Ollie
@Gunners has very eloquently explained, the process of selection is rarely quick and often involves a lot of to-ing and fro-ing between prospective owner, tilty manufacturer, dealer, wallet and, not least spouse or partner.