Are you making a door and frame from scratch or just putting stuff onto a pre-fab?
A lot of choices are down to personal preference and style of the door, for example putting brushed stainless steel hardware on a really classic Victorian door looks a little out of place compared to more traditional designs.
On my standard stuff, I like to use
Eclipse Insignia Hinges with the Bronze washers, I prefer them over the ball bearing hinges because they don't leak black goop all over the frame and door in a couple months, they're about £10 a pair when they're not on special offer but well worth it, I put three on each door I do.
For a lock I like to use a
Tornado three-point locking system for the added security and also fixing the door in three places on each side helps prevent door twist in natural timber doors. Westward do a package deal on these where they give you the lock system, keeps, the euro cylinder and a handle.
I tend to use
stainless steel espag handles but again, it all depends on the style of door. All in, the hardware is usually about £150 of the cost of a door, it can sometimes be quite a bit more if you decide to go for that "From the Anvil" stuff which can be a bit hit and miss.
For seals, I use a Aquamac 124 seal on the rebate seat of the frame and an Aquamac 21 seal in the rebate itself but closer to the 124 seal so it doesn't foul the locking keeps and hinges: