There's a distant connection to Joop via the jasmine and smooth sandalwood, and also their very smooth characters, but Reflection is wholly better in regards to quality of ingredients and composition, in my opinion. Joop! lasts longer and projects more and is more synthetically sweet. Reflection is rather sweet but the sweetness is much 'lighter and airier' - it's sweetness is moonlight shimmering off a placid lake at midnight whereas Joop!s sweetness is more like a laser pointer into your eyes. Well, ok, that's a weird analogy but let's just say Joop!s sweetness is much heavier, thicker, suffocating, and cloying. Reflection's progression on my skin is something like aromatic opening of rosemary and petitgrain -> early heart with noticeable orange blossom, some allspice (the red pepper berries listed in the top notes) is anchoring this along with the woodier facets of the petitgrain but neither are very prominent yet)-> a wonderful iris note filled out with the ylang ylang segues into the later heart where the jasmine and allspice begin to take center stage, now being filled out with a hint of vetiver and patchouli and a good dose of very smooth, mysore-esque sandalwood -> eventually florals fade almost completely and the smooth and sweet woody base remains, at first smelling almost like a powdery vetiver and over time becoming more and more sandalwoody (with a trace of patchouli present to add body, depth, and some 'darkness' to the drydown). If you like orange blossom, iris, and/or jasmine, I think you'll love this scent. You have to like powder, too, but it's not as powdery as some scents and imho the powder is always well balanced and "filled out" with woods or other notes - it never becomes a thin/cheap powder.
If you like Epic (I am assuming you mean Epic Man, since you didn't specify) I definitely think you need to check out Jubilation XXV. Jubilation XXV eventually becomes almost as incense heavy as Epic, but goes through a beautiful transition to get there, starting with a thick blackberry and winey davana opening, then into a spice prominent heart, which eventually becomes a spiced/dried/fruit/frankincense and woods melange.
I also think you should check out Lyric Man, if for no other reason than it being an amazing rose-dominant scent for men.
Ciel is somewhat similar to Silver although it is more "blue" in color and feel, and develops more. Ciel is a GREAT springtime scent, and always works well on cool but sunny days with open blue skies. One of the absolute best in that situation.
And yes, I do think you should check out Reflection. It's one of my absolute favorite scents. Be sure to give it a few wears (as with most of the Amouage, but especially this scent, Ciel, and even Silver, all which are a bit more "mainstream in their approach") as it has a lot of hidden charms that can get lost in the experience of the first wear. Actually, that's also very true for Lyric Man - it may smell very linear on the first wear but there is a lot of complexity and notes weaving into and out of the rose note which is the ribbon threaded throughout the center of the composition.
Dia Man is worth a sniff too, if only because so many here seem to love it, but I am not a fan. The florals against the woods and resins in this one end up making it smell a bit like peanuts, in a strange, oily kind of way. I do like the heart and base but the first hour or two are rather blah and at Amouage prices, that's a deal-breaker for me.