Need advise for my current system.......

Dadlia, check out the Odyssey Stratos amps at odysseyaudio.com. There you will all the reviews on this amp. It sells for $995 or fully loaded for $1095 and it should blow away any other near it's price range. The Absolute Sound gave it Golden Ear Award last year. International Audio Review rated it the second best solid state amp in 1999.

They also come with a 20 warranty. And you can order a pair in monoblock versions for around $2100.

I've never heard but I have two friends who bought them and love them.

The McIntosh will be the better fit if you are looking at softer tones. The Krell will be more agressive as will the Odyssey. Read the review in the Absolute Sound regarding the Odyssey. Yes, they said it was good, however it tends to be tipped a bit at the upper end.
If you were not impressed with the Krell, look at the McIntosh. Let your ears decide, not our writings or our recommendations of amps we have never listened to. I have heard Krell, McIntosh, Acurus etc. and can verify the Acurus is tending to go towards the brittle. Their whole line does that, including the Aragon line. With your B and W speaker, you would most likely want a big fat sound. McIntosh gives you it. But try it, it still might not be what you like. Might go too far in the direction. Keep looking and LISTENING. That is your best guide. Each ear is different and no matter what I like, it might not be what you like. However, I would only recommend an amp I have listened to.

If you like your Meridian gear, I encourage you to consider Classe amplifiers. Year-in and year-out, Classe makes a very listenable, very natural sounding, and very reliable line of solid state amplifiers. I would expect it to give a nice balance to the rest of your system. System synergies are what its all about in putting together an audio system.
www.classeaudio.com

One component that you might want to consider (if you haven't already) is the digital cable between your transport and DAC before changing your amp. With both coax and AES/EBU (I use the latter) I've found this cable to be an important component in my system. I use Cardas for its performance/value but I'm sure there are other choices as well.

The last thing you want is an amp that muffles and softens the musical presentation. It will add a grain and hash to the highs, strip away the initial attack, the ensuing natural decay, and the dynamics giving you a dull and lifeless presentation. Your B&W's should help compensate for a good, articulate, and transparent solid state system.

The amplifier is the cornerstone to any system, good or bad. As your amp goes, so goes your system. I would suggest not compromising on this component. That's why you should give the Odyssey Stratos your consideration.