@OP I am not familiar with the impedance and sensitivity of your current speakers or Martin Logans. But I would say if your budget is approximately $3K for the amp it would be good to know if you plan to only use high sensitivity speakers or not because that will impact the wattage you will need to some degree. More so with SS than with tubes. As far as Pass Labs I think they are generally going to be beyond your budget especially if your wattage need is high. I even think a Bryston 4B3, which is a great amp, might be beyond your budget unless their used market value has dropped. For keeping within budget you will definitely make it with a pair of Schiit Aegirs or Vidars used as monoblocks. But not sure they meet the punch above their weight criteria. Maybe. But, and this maybe controversial for some of us here, I think you can find something within your budget, that will represent good value, and if purchased through a reputable company or it’s US distributor, if you look to a Chinese company. Contrary to some opinions here, and political issues aside, companies like Denafrips, Keces, Holo Audio and others who I am not recalling make quality products. I own some of them. If they make amplifiers I would check them out. But, as I have said on other posts, no matter who the company is, always try to pay with a credit card that values your business and has excellent buyer representation when disputing a charge. Use that card through PayPal so your card info is protected. IMO the best card to use per the above is American Express. Since I don’t think you are interested in active speakers I will leave it at that. I hope that was helpful.