What do you mean by "best deal"? as that is quite a subjective term among shooters, I would say your "best money spent" is money spent on something that will remain consistent and reliable through-out its life. The Maximus is definitely cheap to buy, because it is cheaply made, myself and many others have experienced leaks right out of the box as well as other QC related issues. Not to mention it is extremely petite and feels as though it could fall apart at any minute, just my experience YMMV
I would say your best bet (long term) is to buy a gun that will still be shooting as good in 5yrs as it was the day you received it. I have/do own tuned cheap guns and high quality stuff, by the time you fully tune a cheap gun, whether all at once, or piece by piece, you will potentially end up sinking the same amount of money into it. I was pricing out all the parts to tune up another 1377 the same as my 1377 PFT gun that I built a couple years ago and you can easily sink $600 into a 1377 plus the cost of the gun...Or you can buy something like an AA Alpha Project for another $150. That being said, I would put my tuned 1377 up against any PFT gun, but at the end of the day it is still a cheap gun with way more variables requiring more maintenance and being less reliable. Age old argument seen in many sports/hobby's, but over the years I have seen the best results from the "buy once, cry once" approach, but it also depends on how much you use the gun and what your intentions/requirements/financial constraints are. By what you have written in your original post, I get the impression you are seeing the inconsistencies/problems that usually come along with lower end gear.
Anyway, my number one PCP recommendation is almost always a S400/S410/S500/S510, I have owned 4 different variants of these rifles for about 6-7 years now and they are simply top shelf, the sort of equipment that you can hand down to your children with the kind of accuracy that puts the blame of missing solely on my shoulders
Those who are familiar with these guns know what I am talking about and if you have the chance to try one out; do it!!! you will not be disappointed...In a nutshell; you buy one of these and you won't need to buy another gun, unless you tell yourself you do!!!
http://www.airgunsource.com/air-arms-s5 ... ck/dp/1638This is also a screaming deal on a great quality gun, the scope is "so-so", but for free with that rifle? its pretty hard to argue with...
FX T12 Walnut .177 Cal w/ Free Hawke Airmax 3-9x40 AO Scope
http://www.airgunsource.com/fx-t12-waln ... pe/dp/1477