First to answer: I want to play for the win. I wouldn't feel comfortable taking an immediate draw, I get to play so infrequently at the moment that if I'm going to sit down to play, I'm going to play to win.
After some review, I've switched my mind and moved to
1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.h3 Bb7 10.d4 Re8 11.Nbd2 Bf8
and now instead of 12.a4 as described above, I will play
12.d5.
This move is marked in CB13 as "Hot" and has been played by players like Morozevich, Ivanchuk, Caruana, Svidler, which are pretty good examples to follow. The next couple of moves are relatively forcing:
12...Nb8 13.Nf1 Nbd7
This now leads to a position where there seems to be a lot of debate; for many years, it seems 14.Ng3 was the main line, but in recent years, the theory has moved to
14.N3h2. Both moves have been played by players up to the Kasparov/Anand level which I consider the gold standard. It appears from playing through a number of the games is that the issue with Ng3 is it's a bit too forcing; black basically plays g6 immediately, and is then relatively safe, and white has to re-route the knight. However, if you play 14.N3h2 first, you leave open the option of playing Ng3 later, while delaying to see if black chooses to play g6. If so, you save a move in getting the f1 knight back into the game.
The more common move for black appears to be a choice between 14...h6 (which stops Bg5 but leaves f5 much weaker) or the old school 14...Nc5. The game then continues relatively straightforwardly, as black attempts to open up the center and activate his light squared bishop.
14...Nc5 15.Bc2 c6 16.b4 Ncd7 17.dxc6 Bxc6 18.Bg5 h6
So black has done some reasonable consolidation, but at this point a couple of strategic points come into play. Black's d6 pawn is a mess - it's backwards and weak, and makes the dark squared bishop bad. White on the other hand has a weak and backwards c3 pawn. So, white attempts to basically trade down into the best ending possible.
19.Nxf6 Nxf6 20.Ng4 Nxg4 21.Qxg4 Bd7 22.Qf3 Rc8 23.Bb3 Be6 24.Rec1 Be7 25.Rc2 a5 26.Qd3 Bxb3 27.axb3 axb4 28.Ne3 Rxc3 29.Rxc3 bxc3 30.Qxc3
So, white has shed one pawn. However, his knight is going into d5, the b5 pawn and d6 pawns are going to remain extremely weak, and he has control of both open files. If/when white wins the b5 pawn without trading his knight, the ending will be massively superior for white, and if he somehow fails to win it (or has to trade knight for bishop to win it), the ending is still pretty much unloseable.
Feel free to comment on any of the above, and I'll let you all know how it goes tomorrow.
Source game: Anand-Kasimdzhanov 2007 (which white won).