I had to buy Dede to replace Kaboul as he was adamant on having a 21m release clause in his contract as it expires 2 years from the start of the game (so try and offer him one before the end of the 1st season and hopefully he wont ask for such a low release clause)
he was valued at 18m at the time, so made nothing off him really! Dede is nearly an exact match stat wise as I love Kaboul
Dembele is probably still one of my best players and best players I have managed before, even though he drops down to like 3 stars and sometimes less, I never bother with that, his stats are amazing and he is also very good as AMR
I can also suggest youngsters like:
Schrijvers/Bruno (Belgium)
If you ever sell Sandro, which I advise NEVER too! try and get Romulo - Spartak to replace him! he is quality too
other than that, good luck!
PM me if you want anything else, oh I see you want to use my 433, I suggest also using my Klopp tactic, works a charm for Spurs