I can't see us getting Lukaku unfortunately.
For me:
Diame (if available and with his low buy-out clause, ideal for midfield back up and offers something a bit different to what we've got) - £3.5mil
Barry (no brainier - key to any success we'll have next year. Retaining the ball will be key in Europe. Wages only issue but I reckon if we offer him a 2 year contract on £60k he'd take it to be playing consistently and challenging on all fronts at this stage in his career) - FREE
Dusan Tadić (beast of a player. If we'd have had a true playmaker such as him this season we'd have turned a lot of those draws into wins. Ideal) - £10mil.
Deulofeu (was ace just before Christmas and the injury detailed him a bit. Will get better next season and would tear some dodgy European defences a new one. Again, a no brainier for me if it's an option). - LOAN
Batshuayi (One of the brightest talents in Europe this season. Pace, power and a good finisher. Ideal as the secondary striker in the squad.) - £7-£8mil (if but out clause is true)
Now, here I think we have a choice of a few players. I reckon if we got all of the above, we might have around £10-£13mil. Left to spend without selling anyone major. Here would be my shortlist: (I'd love Bony here but reckon he'd be too expensive):
Remy (proven striker in the prem. Pacey, strong and a great finisher. Probably at his level at a club like ours but i think his wages would be an issue. Wants to play in the Champions League as well, and I reckon if a big London club comes into him he'll be off there). - £12-14mil.
Lacazette (Great talent but not sure he'd be able to play the loan striker role. Would probe better playing as part of a front 3. Apparently turned us down in Jan. but I reckon he'd be a great signing) - £10mil.
Carlos Vela (Quality player, can play anywhere across the forward line. Again not sure if he'd be able to play the loan forward role as well in the Prem.) - £15mil.
Carlos Bacca (Would be my choice if we were gonna go with a striker from abroad. Quick, strong and good hold up play. Perfect for Martinez' system and has been class for Sevilla in La Liga and Europa this year. Could be a risk but could be the ideal replacement for Rom.) - £10mil (given he has a £9mil. buy-out clause according to Spanish media)