just to confirm, the V3 ring is just a single ring of LED's, the V4 ring has two rings of LED's, you only need to buy the V4 ring if you want the white ring and a colour.
Personally, if you can afford it, I would recommend getting the V4 rings with a colour (not indicator as it looks rubbish IMO) but like red or blue etc. and wire that coloured ring up to a switch, I have the white and blue angels on my Coupe and the blue really impresses people so makes it worth the extra £20 or so ...
If you need any advice on it bud I'd be happy to help, just send me a PM
Also bud, the Gen2 guide can pretty much be applied to the Gen1, I say this as I have looked at doing it and they are pretty much the same just different sized rings, so following that you should be ok with ... And as you say if you wire the angels up to your sidelight bulb then they will be on as your sidelight and they will stay on when you put your dipped headlights on ... Yes they are on shark racing so just double check the sizes with the table on the shark racing site, as ash said the white is completely illegal and you can have the angels on when it is however dark, I've driven past police when it has been really dark and I haven't been pulled, which IMO makes the angels even more worthwhile as they are so little seen on the roads that they look majorly impressive.