@Sdynamics If I might offer some advice. Since I don't know your age or location I will be brief. Learn, Listen, Look & Learn. This is a hobby and not an investment stratagy. Your Philips amp & Pre are some of their very best. You will not best them for $550.00 cad You will in fact need to aim much higher unless some true "high end" components fall in your lap. What speakers and other sources are you listening to? Why are you thinking of making a change? What benifit are you wanting from said change? If you answer these questions you will be in a much better place to make a change/purchase.
Don't rely on anything I said or others say. Only you know what sounds good to you. Audiokarma is a great resource but it is up to you to sort and refine the the info you get here.
If you folow this advice you will do quite well I am sure.
Eric & Erin