Vitus are generally great value for money – you really need to find other brands in big sales to get close for the money.
I’m not sure in terms of spec how the Calibre Line10 compares or whether they make a more expensive model with a better spec – I think they’re about £750.
I bought a Vitus Sentier Vrx+ frame only (27.5” wheels instead of the 29er) and built it up from a variety of bits – some I already had (wheels / stem / saddle / bars / tyres / pedals), some secondhand (Rockshox Pike from eBay) and some new (sram GX 11 speed drivetrain / headset / cranks / BB / dropper).
It would probably add up to around £1500 but it’s just such a fun bike to ride. It manuals and pops off trail features easily, pedals well, climbs well, and is amazing on corners. Other than missing a fancy brand name on the downtube it’s near perfect.