You mean Jeremy Brett? I don't think Jeremy Irons has ever played Holmes, which is a pity.
I've been re-watching the Brett series lately on Blu-ray. This is my third time through, after watching every episode once on TV and again on DVD. I laid down $150 for the complete series on Blu-ray, and I don't regret it.
The film series with Basil Rathbone is also excellent, though purists tend to bicker about that one since it deviates quite a bit from the literature. I don't care; I value my Blu-ray set of those films as much as the Brett series.
If you've read the original 60 stories by Doyle and you want more, I'd recommend starting with the three novels by Nicholas Meyer (The Seven-Per-Cent Solution, The West End Horror, and The Canary Trainer). None of the others I've read have matched Meyer's work, though The Exploits of Sherlock Holmes (co-written by Doyle's son) and Michael Chabon's The Final Solution have enough to recommend about them.
Honestly, the best pastiches are in film rather than in literature: the Rathbone films, Disney's The Great Mouse Detective, the Robert Downey Jr. films, the BBC's Sherlock with Benedict Cumberbatch, and Elementary with Jonny Lee Miller.
Though nothing, of course, matches the magic of those original Doyle stories.