I wouldn't do the seals unless they need it.
I tried to replace mine in my old forks (Judys) and didn't have anything to press them in with. A mate & I managed to cobble something together, but even then with a lot of pushing, we only got them in about 2/3 of the way. They stayed in, but didn't look pretty. Replaced the forks a couple of months later.
They were about 6/7 yrs old and it was there first service – the foam rings were in quite poor shape, but the seals were fine – with hindsight I didn't really need to replace them.
We serviced a set of Rev 426 coil U-turns last night & my 08 Reba Air u-turns. Pretty straightforward if you follow the tech manual.
I bought a service kit from TFT but everything looked like new so I didn't use it – I will save it for the next service, I think.
Get your oil from a motorbike shop – it's cheaper, although saying that Chain Reaction do some SVI stuff at a decent price.
Only other tip would be to buy some decent circlip pliers. Mine are rubbish & kept bending, have lots of rags/cloth/tissue handy & copious amounts of IPA/degreaser to clean everything thoroughly with.