The Lobos are great detectors but the price of the sensitivity is a lack of depth and there's no toys.
The two detectors you have choosen will both give you more depth and are quite similar in some ways (Gamma 7.8 kHz, Whites 6.592 kHz frequency) and stock coils that each suffer the same problem of target masking from nearby metal.
The Gamma is new, lightweight, and well featured for its price. The Spectrums are metal built, tried and tested and have just about every adjustment you should ever need. A best seller for years with good reason. On the other hand no longer made and performance with any older detector can be iffy as things drift off tune.
I love my XLT but to get the best out of it you have to work, consider what your after and the sites your on. On the other hand it will grow with you so you won't get bored with it. The Teknetics is good but I would rather have a secondhand T2 than a new Gamma. Weight could be a consideration as the older you go in the Spectrum line the heavier they are and feel. The XLT had an improved battery system, smaller, lighter control box so it doesn't feel as bad as the weight would suggest (but double that of the Gamma).
I've decided. On the reliability side, new with a warranty has most attractions. I would not get an older Whites, no need for a E series, but the XLT is as old as you should go unless you know who you are buying off. The Gamma is good but for a little more you can get better so check the models just up the range and perhaps take advantage of those who have to have the latest "fashion" in detectors and buy a near new with remaining or a dealers warranty.
