currenty have a 210mm non slider and i cant count the amount of times lately ive needed to cut more than 13cm..
216mm or 255mm are the standard sizes for mitre saws in the UK, usually with a 30mm bore, although some have 20 & 22mm. USA has 10" 12" and 7 1/4 inch. So watch cheap blades on eBay that are listed in inches, they're often imports and may need a centre spacer.
Review for the scheppebafh (or whichever) on screwfix says good range of blades for the size.
This has a 5 Year Warranty too, not 3. Ordered yesterday. Thought about the stand too, may add it to order.
Tempted by the also, £140 for this and the stand seems pretty good