I have no direct experience on the Eibach Pro-Street-S coilovers for the V40 but I'm basing my review on the same line for another car (MX-5, NC model). This kit is a "basic" coilover with only height adjustment and fixed damping (street use) with "twin" tube technology, yet materials are of top quality and this reflects on the price which is a bit high for my opinion. Indeed if you want a street kit, it's very reliable and "comfort oriented".
If you are looking for a more "sporty" kit you should check for "monotube" kit coilovers from other producers for example such as BC Racing, Meister, Bilstein, Ohlins, etc. For sure BC Racing has a couple of models available for our V40. Bilstein and Ohlins are superior im my opinion but they do cost more and I'm now aware if they offer a kit for the Volvo.
If you like the Eibachs, I'd suggest to take a look at the kits from ST Suspensions, the "cheap" line from the german producer KW Suspensions. I've heared a lot of good reviews from ST users (Focus and V40 drivers).
ST has 2 kits, one only heigh adjustable (ST X) and another height and damping adjustable (ST XA). You can check on their site for more info. Both kits are below 1000 EUR. They only downside of these kits is that they're made from galvanized steel, which is more prone to bad weathering. Maybe you should consider it if you live in UK. On the contrary KW Suspesions coilovers are made of stainless steel, but their basic V40 kit is almost double priced than the ST basic version.
A "cheap" monotube kit is the one made from HSD, check their "monopro" model. Yet I have heared conflicting views on their kits. It seems they're more oriented to track use and are not very confortable on streets and they do not last very much.